NEWMARKET CORP 8-K

What Happened
On February 26, 2026 NewMarket Corporation announced that its Board of Directors elected Bruce R. Hazelgrove, III to serve as a director effective immediately. Mr. Hazelgrove currently serves as the Company’s Executive Vice President and Chief Administrative Officer. He will not receive any additional compensation for his board service and will serve on the Board’s Executive Committee. He will not serve on the Board’s other committees because he does not qualify as an independent director due to his officer role. The filing incorporates by reference related-party information about Mr. Hazelgrove from NewMarket’s Definitive Proxy Statement filed March 12, 2025.

Key Details

• Election date: February 26, 2026.
• Director added: Bruce R. Hazelgrove, III — Executive Vice President & Chief Administrative Officer.
• Compensation: No additional director compensation for Mr. Hazelgrove.
• Committee assignments: Member of the Executive Committee; not assigned to other committees due to non-independence.
• Related disclosures: Related-party information referenced from the March 12, 2025 Definitive Proxy Statement.

Why It Matters
This is a board composition and governance update: an existing senior executive was added to the Board and will sit on the Executive Committee. Investors tracking corporate governance should note Mr. Hazelgrove’s dual role as an officer and director and that he is not considered independent for committee service. For details on any related-party relationships or transactions involving Mr. Hazelgrove, consult the referenced March 12, 2025 proxy statement.